Windows 7: Sudden Partition Lost After Installing 7

Hi guys

First, there are 3 partitions on my hard drive, C:/ (XP) and D:/,E:/ (Data) on 1 hard drive.
Then i installed windows 7 on unpartitioned free space, so i can get a dual boot.
After the installation done, D:/ and E:/ suddenly missing, i checked the disc management and the 2 partitions aren't there, but
there is a new free space with the same size as my 2 partitions before.
I tried using EASEUS Data Recovery to get it back, after scanning, the 2 partitions can be recovered, but it
need a new hard drive since i don't have any space left, is there a chance i can get it back
without a new hard drive ?

My HDD is Seagate Barracuda 500GB

Thank you for your help.



Here is the computer management pic.